A lock blade for a terminal

Abstract

The application discloses a lock piece of a terminal which can be unlocked and belongs to the technical field of connectors, comprising a plug-in terminal, a rectangular hole, a glue shell and an L-shaped locking piece, a plurality of rectangular holes are formed in the glue shell, the two ends of the rectangular hole respectively penetrate the end part of the glue shell, a plurality of plug-in terminals are respectively plugged in the rectangular holes, one end of the L-shaped locking piece is clamped on the top of the glue shell, the other end of the L-shaped locking piece is inserted in the rectangular hole and abuts between the top plate of the glue shell and the plug-in terminal. The application solves the problem that the connection effect is not good and the service life is short due to the direct plugging of the terminal and the glue shell in the prior art. In the process of taking out the L-shaped locking piece, the synchronous unlocking of the plug-in terminal is triggered, and then the quick disassembly is realized. The service life is improved, and the installation and separation are more convenient.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and more specifically to a locking tab for an unlockable terminal. Background Technology

[0002] In connectors, ensuring a stable connection between the terminals and the housing is a problem that those skilled in the art should address.

[0003] For existing connectors, in order to insert the terminal into the housing after connecting the wire, and because frequent replacement is required, the connection between the terminal and the housing is generally a plug-in type. Although this method is convenient for connection, there is a serious problem: the wire is usually made of metal wire. When current flows, because the metal wire itself contains resistance, the current flow will inevitably cause heat. The plastic spring used to limit the terminal is usually a plastic spring. Under the heat of the wire for a long time, the plastic spring will undergo irreversible deformation, and eventually lose its limiting effect. The best solution is to add a locking plate between the terminal and the plastic spring to prevent the heat from being directly dissipated to the plastic spring and causing it to deform. However, the locking plate usually has a certain thickness. Under the pressure of the plastic spring and the terminal, the locking plate can easily be squeezed out, causing the limiting effect to disappear.

[0004] Therefore, how to provide a locking piece for unlockable terminals to solve the defects in existing connector structures is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] Therefore, the present invention provides a locking piece for unlockable terminals to solve the problems of poor connection effect and short service life caused by direct insertion of terminals and housings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention discloses a locking piece with an unlockable terminal, comprising:

[0008] A plastic shell has several rectangular holes inside, with each of the rectangular holes penetrating through one end of the plastic shell.

[0009] Several plug-in terminals are respectively plugged into the rectangular holes;

[0010] The L-shaped locking piece has one end snapped into the top of the housing, and the other end of the L-shaped locking piece is inserted into the rectangular hole and abuts against the top plate of the housing and the plug-in terminal.

[0011] The L-shaped locking piece consists of a locking part, a plug-in part, and a limiting protrusion. One end of the locking part is snapped onto the outside of the housing, and the other end of the locking part is connected to the plug-in part. The limiting protrusion is installed at the bottom of the other end of the plug-in part and abuts against the plug-in terminal. A limiting member is provided inside the housing, and the bottom of the limiting member abuts against the plug-in part.

[0012] In one possible implementation, the housing includes:

[0013] The housing has a rectangular hole inside, which extends through both the front and rear ends of the housing.

[0014] Several trapezoidal blocks are installed at the upper and lower ends of the housing. A retaining plate is provided on the top of the housing. The retaining plate is located in front of the trapezoidal blocks, and the front surface of the retaining plate is flush with the front surface of the housing.

[0015] Several extension rods are installed at the bottom of the top plate of the housing, and the extension rods are disposed in the rectangular holes;

[0016] A partition plate is disposed between the rectangular holes;

[0017] A pressure plate is installed at the end of the extension rod, the pressure plate is disposed inside the rectangular hole, and the pressure plate serves as the limiting member;

[0018] A pad is installed above the bottom plate of the housing, and the pad is positioned below the extension rod;

[0019] An extension block is installed below the top plate of the housing, and the extension block is located behind the pressure plate.

[0020] In one possible implementation, a pair of locking blocks are mounted on the upper side of the pad, and the pad, the pressure plate, and the two locking blocks together form an installation space.

[0021] In one possible implementation, the L-shaped locking piece includes:

[0022] The mounting plate has several insert rods installed on one side wall, and the insert rods are inserted into the rectangular holes.

[0023] Hooks are installed in pairs on one side wall of the mounting plate, the insert rod and the hook are located on the same side, and one end of the hook is hung on the card plate;

[0024] A first connecting plate is installed between two of the two insert rods, the two insert rods forming a group, and the first connecting plate is connected between them;

[0025] A pressure rod is installed at the other end of the insertion rod, and a second connecting plate is installed between the bottoms of the two pressure rods;

[0026] The limiting protrusion is installed at the bottom of the second connecting plate;

[0027] The mounting plate and hook together form the locking part, and the second connecting plate, the limiting protrusion, the pressure rod, the insertion rod and the first connecting plate together form the insertion part.

[0028] In one possible implementation, the upper end of the connection between the pressure rod and the insertion rod is an arc-shaped structure, and the lower end of the connection between the pressure rod and the insertion rod is an inclined surface.

[0029] In one possible implementation, a groove is formed on the inclined surface, and the groove extends toward the second connecting plate.

[0030] In one possible implementation, a placement hole is formed between the insert rod, the first connecting plate, and the second connecting plate.

[0031] In one possible implementation, the plug-in terminal includes:

[0032] The first rod is inserted into the rectangular hole, and an extension ring is fitted on the outside of the first rod.

[0033] A crimping end face is provided on the extension ring;

[0034] The second rod is connected to the first rod via an annular connector, and the limiting protrusion is located above the annular connector.

[0035] This invention connects the plug-in terminal and the L-shaped locking piece through a rectangular hole in the housing. One end of the L-shaped locking piece is locked to the outside of the housing, while the other end is pressed by a pressure plate inside the housing, causing its end to press against the plug-in terminal. This pressure ensures tight contact between the plug-in terminal and the housing, providing a first layer of restraint. If heat conduction causes irreversible deformation of the pressure plate, the L-shaped locking piece, being locked in place, still restricts the plug-in terminal. Furthermore, removing the L-shaped locking piece triggers the synchronous unlocking of the plug-in terminal, enabling rapid disassembly. Although not fully compressed, the plug-in terminal is still prevented from easily shifting. This significantly improves the connector's lifespan and effectively prevents the plug-in terminal from detaching from the housing. Attached Figure Description

[0036] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0037] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0038] Figure 1 An assembly perspective view of the unlockable terminal provided by the present invention;

[0039] Figure 2 A perspective view of the plastic shell provided by the present invention;

[0040] Figure 3 A perspective view of the housing, extension rod, pressure plate, and pad provided for this invention;

[0041] Figure 4 A cross-sectional view of the card block provided by the present invention;

[0042] Figure 5 A perspective view of the L-shaped locking piece provided by the present invention;

[0043] Figure 6 A perspective view of the groove provided by the present invention;

[0044] Figure 7 A cross-sectional view of the plug-in terminal provided by the present invention;

[0045] Figure 8 A perspective view of the crimped end face, extension ring, first rod body, and annular connector provided by the present invention;

[0046] Figure 9 This is a schematic diagram of the unlocked state provided by the present invention;

[0047] In the diagram: 1. Plug-in terminal; 11. Crimping end face; 12. Extension ring; 13. First rod body; 14. Annular connector; 15. Second rod body; 2. Rectangular hole; 3. Plastic shell; 31. Housing; 32. Extension rod; 33. Clamping plate; 34. Trapezoidal block; 35. Pressure plate; 36. Pad; 361. Clamping block; 37. Divider plate; 38. Extension block; 4. L-shaped locking piece; 41. Second connecting plate; 42. Limiting protrusion; 43. Pressure rod; 44. Insert rod; 45. First connecting plate; 46. Mounting plate; 47. Hook; 48. Arc structure; 49. Inclined surface; 410. Groove; 411. Placement hole. Detailed Implementation

[0048] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please refer to Figures 1-9 The present invention will now describe a locking piece for an unlockable terminal, as follows: Figure 1 The device includes a plug-in terminal 1, a rectangular hole 2, a housing 3, and an L-shaped locking piece 4. The housing 3 has several rectangular holes 2 inside, with both ends of the rectangular holes 2 passing through the ends of the housing 3. Several plug-in terminals 1 are inserted into the rectangular holes 2. One end of the L-shaped locking piece 4 is snapped onto the top of the housing 3, and the other end of the L-shaped locking piece 4 is inserted into the rectangular hole 2 and abuts against the top plate of the housing 3 and the plug-in terminal 1. The L-shaped locking piece 4 consists of a locking part, a plug-in part, and a limiting protrusion 42. One end of the locking part is snapped onto the outside of the housing 3, and the other end of the locking part is connected to the plug-in part. The bottom of the other end of the plug-in part is equipped with a limiting protrusion 42, which abuts against the plug-in terminal 1. A limiting member is provided inside the housing 3, and the bottom of the limiting member abuts against the plug-in part. The rectangular hole 2 is used to install the L-shaped locking piece 4 and the plug terminal 1. The plug terminal 1 is connected to a wire. After the rectangular hole 2 passes through the housing 3, the plug terminal 1 is installed in the housing 3. Then, the other end of the housing 3 is aligned with the connection interface to complete the connection between the plug terminal 1 and the interface.

[0050] In a specific embodiment, such as Figures 2-4The housing 3 includes a housing 31, an extension rod 32, a retaining plate 33, a trapezoidal block 34, a pressure plate 35, a pad 36, a partition plate 37, and an extension block 38. A rectangular hole 2 is opened inside the housing 31, which passes through the front and rear ends of the housing 31. Several trapezoidal blocks 34 are installed at the upper and lower ends of the housing 31. A retaining plate 33 is provided on the top of the housing 31, and the retaining plate 33 is located in front of the trapezoidal blocks 34. The front surface of the retaining plate 33 is flush with the front surface of the housing 31. Several extension rods 32 are installed at the bottom of the top plate of the housing 31 and are located in the rectangular hole 2. The partition plate 37 is located between the rectangular holes 2. The pressure plate 35 is installed at the end of the extension rod 32 and is located inside the rectangular hole 2. The pressure plate 35 is a limiting component. The pad 36 is installed above the bottom plate of the housing 31 and is located below the extension rod 32. The extension block 38 is installed below the top plate of the housing 31 and is located behind the pressure plate 35. The purpose of the extension rod 32 is to extend the pressure plate 35 to the middle of the housing 31, so that the pressure of the pressure plate 35 is applied to the middle section of the plug terminal 1, making it less likely to press the plug terminal 1 out. The extension rod 32 acts as a reinforcing rib of the pressure plate 35, making the pressure plate 35 less likely to break. The clamping plate 33 is used to clamp the hook 47. The pressure plate 35 and the pad 36 cooperate with each other to limit the position of the plug terminal 1 and the L-shaped locking piece 4 to complete the connection. The extension block 38 cooperates with the pad 36 to guide the installation position of the plug terminal 1.

[0051] In a specific embodiment, such as Figures 3-4 A pair of locking blocks 361 are installed on the upper side of the pad 36. The pad 36, the pressure plate 35, and the two locking blocks 361 together form an installation space. The design of the locking blocks 361 is to first cooperate with the pad 36 and the pressure plate 35 to form an installation space. The installation space is set to restrict the plug-in terminal 1. In addition, the locking blocks 361 can restrict the left and right movement of the plug-in terminal 1.

[0052] In a specific embodiment, such as Figure 5The L-shaped locking piece 4 includes a second connecting plate 41, a limiting protrusion 42, a pressure rod 43, an insert rod 44, a first connecting plate 45, a mounting plate 46, and a hook 47. Several insert rods 44 are installed on one side wall of the mounting plate 46 and are inserted into rectangular holes 2. Hooks 47 are arranged in pairs and installed on one side wall of the mounting plate 46. The insert rods 44 and hooks 47 are on the same side and one end of hooks 47 is hung on a card plate 33. The first connecting plate 45 is installed between two insert rods 44. The two insert rods 44 form a group and are connected by the first connecting plate 45. The pressure rod 43 is installed at the other end of the insert rod 44. The second connecting plate 41 is installed between the bottoms of the two pressure rods 43. The limiting protrusion 42 is installed at the bottom of the second connecting plate 41. The mounting plate 46 and the hooks 47 form a locking part. The second connecting plate 41, the limiting protrusion 42, the pressure rod 43, the insert rod 44, and the first connecting plate 45 form a connecting part. Two pressure rods 43 form a group. A second connecting plate 41 is installed below each group of pressure rods 43. A limiting protrusion 42 is installed below the second connecting plate 41. The limiting protrusion 42 presses against the plug terminal 1 under the action of the pressure plate 35 to limit the movement of the plug terminal 1. The number of pressure rods 43 depends on the number of rectangular holes 2. One group of pressure rods 43 is set in one rectangular hole 2. The plug rod 44 is used to connect the pressure rods 43, and the first connecting plate 45 is used to connect the two plug rods 44 together to prevent the plug rod 44 from breaking when the pressure plate 35 applies pressure. The mounting plate 46 is designed to be narrow at the top and wide at the bottom, firstly to adapt to the size of the card plate 33, and secondly to save materials.

[0053] In a specific embodiment, such as Figure 6 The upper end of the connection between the pressure rod 43 and the insertion rod 44 is an arc-shaped structure 48, and the lower end of the connection between the pressure rod 43 and the insertion rod 44 is a slope 49. The arc-shaped structure 48 can buffer part of the pressure of the pressure plate 35.

[0054] In a specific embodiment, such as Figure 6 A groove 410 is formed on the inclined surface 49, and the groove 410 extends towards the second connecting plate 41. The purpose of the groove 410 is to hook the crimping end face 11, thereby driving the plug-in terminal 1 to move synchronously.

[0055] In a specific embodiment, such as Figure 5 A placement hole 411 is formed between the plug rod 44, the first connecting plate 45, and the second connecting plate 41. The placement hole 411 is designed so that the exposed metal part of the plug terminal 1 can be placed in this unobstructed space after the wire is connected, which is conducive to heat dissipation. At the same time, the reserved placement hole 411 can be used to accommodate a part of a larger plug terminal 1 placed in the placement hole 411.

[0056] In a specific embodiment, such as Figures 7-8The plug-in terminal 1 includes a crimping end face 11, an extension ring 12, a first rod 13, an annular connector 14, and a second rod 15. The first rod 13 is inserted into a rectangular hole 2, and the extension ring 12 is sleeved on the outside of the first rod 13. The crimping end face 11 is disposed on the extension ring 12. The second rod 15 is connected to the first rod 13 through the annular connector 14, and a limiting protrusion 42 is disposed above the annular connector 14. The plug-in terminal 1 is a conventional terminal design, except that an annular connector 14 is provided, allowing the limiting protrusion 42 to be disposed at the annular connector 14, further restricting the movement of the plug-in terminal 1.

[0057] In use, the invention first inserts one end of the L-shaped locking piece 4 into the rectangular hole 2, and then hangs the two hooks 47 of the other end of the L-shaped locking piece 4 on the card plate 33. At this time, since no pressure has been applied to the bottom of the L-shaped locking piece 4, it is not enough to deform the pressure plate 35. At this time, the L-shaped locking piece 4 is in an inclined position. After the wire is installed in the plug terminal 1, the plug terminal 1 is inserted into the rectangular hole 2. During the insertion process, the plug terminal 1 drives the L-shaped locking piece 4 to shift clockwise and gradually squeezes the pressure plate 35 to deform. When the L-shaped locking piece 4 is horizontal, the deformation of the pressure plate 35 will generate elastic force. The elastic force squeezes the plug terminal 1 and the L-shaped locking piece 4, so that the bottom of the plug terminal 1 is better pressed on the pad 36, thus completing the limiting of the plug terminal 1 in the housing 3.

[0058] When removing connector 1, as follows Figure 9 First, release the latching relationship between the hook 47 and the card plate 33, then slowly pull out the L-shaped locking piece 4 at an angle. During the pulling process, the pressure plate 35 resets, which will help push out the L-shaped locking piece 4. During the pulling process, the groove 410 on the L-shaped locking piece 4 will hook the crimping end face 11. In this way, when the L-shaped locking piece 4 is removed, the plug terminal 1 will be removed simultaneously. This can avoid direct contact with the plug terminal 1, which may be a live part, reducing the risk of electric shock. Moreover, the removal operation is more convenient and faster. It should be noted that the design of the hook 47 and the card plate 33 in this structure can effectively prevent the pressure plate 35 and the plug terminal 1 from squeezing out the L-shaped locking piece 4.

[0059] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A locking piece with an unlockable terminal, characterized in that, include: The plastic shell (3) has several rectangular holes (2) inside, and the two ends of the rectangular holes (2) pass through the ends of the plastic shell (3); Several plug-in terminals (1) are respectively plugged into the rectangular holes (2); The L-shaped locking piece (4) is snapped onto the top of the housing (3) at one end, and the other end of the L-shaped locking piece (4) is inserted into the rectangular hole (2) and abuts against the top plate of the housing (3) and the plug-in terminal (1); The L-shaped locking piece (4) is composed of a locking part, a plug-in part and a limiting protrusion (42). One end of the locking part is snapped onto the outside of the housing (3), and the other end of the locking part is connected to the plug-in part. The limiting protrusion (42) is installed at the bottom of the other end of the plug-in part. The limiting protrusion (42) abuts against the plug-in terminal (1). A limiting member is provided inside the housing (3), and the bottom of the limiting member abuts against the plug-in part. The plastic shell (3) includes: The housing (31) has a rectangular hole (2) inside, which passes through the front and rear ends of the housing (31); Several trapezoidal blocks (34) are installed at the upper and lower ends of the housing (31). A card plate (33) is provided on the top of the housing (31). The card plate (33) is located in front of the trapezoidal blocks (34). The front surface of the card plate (33) is flush with the front surface of the housing (31). Several extension rods (32) are installed at the bottom of the top plate of the housing (31), and the extension rods (32) are disposed in the rectangular hole (2); A partition plate (37) is disposed between the rectangular holes (2); A pressure plate (35) is installed at the end of the extension rod (32), the pressure plate (35) is disposed inside the rectangular hole (2), and the pressure plate (35) is the limiting member; A pad (36) is installed above the bottom plate of the housing (31), and the pad (36) is located below the extension rod (32); An extension block (38) is installed below the top plate of the housing (31) and is located behind the pressure plate (35).

2. The locking piece of the unlockable terminal as described in claim 1, characterized in that, A pair of locking blocks (361) are installed on the upper side of the pad (36), and the pad (36), the pressure plate (35) and the two locking blocks (361) together form an installation space.

3. The locking piece of the unlockable terminal as described in claim 1, characterized in that, The L-shaped locking piece (4) includes: Mounting plate (46), with several insert rods (44) mounted on one side wall, the insert rods (44) being inserted into the rectangular hole (2); Hooks (47) are installed in pairs on one side wall of the mounting plate (46), the insert rod (44) and the hooks (47) are on the same side, and one end of the hooks (47) is hung on the card plate (33); The first connecting plate (45) is installed between the two insert rods (44), the two insert rods (44) are a group, and the first connecting plate (45) is connected between them. A pressure rod (43) is installed at the other end of the insertion rod (44), and a second connecting plate (41) is installed between the bottoms of the two pressure rods (43). The limiting protrusion (42) is installed at the bottom of the second connecting plate (41); The mounting plate (46) and the hook (47) together form the locking part, and the second connecting plate (41), the limiting protrusion (42), the pressure rod (43), the insertion rod (44) and the first connecting plate (45) together form the insertion part.

4. The locking piece of the unlockable terminal as described in claim 3, characterized in that, The upper end of the connection between the pressure rod (43) and the insertion rod (44) is an arc-shaped structure (48), and the lower end of the connection between the pressure rod (43) and the insertion rod (44) is an inclined surface (49).

5. The locking piece of the unlockable terminal as described in claim 4, characterized in that, The inclined surface (49) has a groove (410) extending toward the second connecting plate (41).

6. The locking piece of the unlockable terminal as described in claim 3, characterized in that, A placement hole (411) is formed between the insertion rod (44), the first connecting plate (45), and the second connecting plate (41).

7. The locking piece of the unlockable terminal as described in claim 5, characterized in that, The plug-in terminal (1) includes: The first rod (13) is inserted into the rectangular hole (2), and an extension ring (12) is sleeved on the outside of the first rod (13). A crimping end face (11) is disposed on the extension ring (12); a second rod body (15) is connected to the first rod body (13) through an annular connector (14), and the limiting protrusion (42) is disposed above the annular connector (14).

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